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The percentage reduction in Ry (wrinkle depth) and Ra (mean surface roughness) versus time (days).
Notes: The reduction was determined by skin surface profilometry for the crow’s feet area of volunteers following an antiaging skin care regimen for 21 days (n=15). Results are presented as mean ± SEM. *P<0.0001 versus t=0, **P<0.001 versus t=0.
Abbreviation: SEM, standard error of mean.
